Lathe-dog.



CQPY

J.LENZ.

LATHE DOG. APPLICATION FILED DEC, 20, 1911.

to employ some means to cause the rotationgagingwith one o.

. head.

.edtobe .Be it known that I, JACOB- 'of the United States, and "resident of Hibhing,

and. often do catch in to produce a lathe facture and simple in operation. 35

JACOB LENZ, 0F H II BIBI-NG, 'MINNESOTA.

ra'innr caries.

fLArrrn-noe.

Specification of Letters Batent.

To all'whom it may concern in the county of St. Louis and State of Minnesota, have invented certain new and useful Im rovements in Lathe -'Dogs, of which the ollowing is aspecification.

My invention relates to lathe dogs and has particular reference to a novel device of such description which shall have noprojecting portions which-might catch the cloth: ing of an operator.

'Inthe operation of lathes it is necessary of the work with the driving mechanism of the lathe. -.'Thi$ is usually accomplished by means of an' appliance called a lathe dog whichis ada ted to be clamped .to the work by means 0 set screws or otherwise, the clamp having a ri ht angled projection enthe -recesses in the lathe In manyofthe lathe dogs heretofore in use'there have been rejections such as the head of the set-bo1t', 'e

the clothing of the operator and cause serious accidents.

Therefore one objectof my invention is dogwhich shall have. no projecting parts, other normally-contacts the :lathe head. 7

A further object is the provision of such a lathe 'dog which shall be cheap to manu- My invention will be more readily understood by reference to drawings, wherein,

Figure 1"is anelevation showing one application of my novel safety device to a lathe'dog, and Fig. 2 is an edge elevationof the'same device.

Referring. more particularly. to the draw ings it willbe seen that the lathe dogwhich I prefer to use is of'a well known form' com- .prising" an integral right angled member having a body-portion. 10, with arectangular opening 11 .formed therein. -Projecting at-right angles from-one'end of the body portion-isan arm "12 which, as will be understood, entersan o ening in or contacts an abutment on a lathe acted? orimis clamped within the opening 11, bymeans of a. suitable clamp- Gopies of this patent gnay'na obtained for five cents each, by addressing the LEN'Z, a citizen c.',=which are liable to than the arm which the. accompanying and having an ead. The-work'adapt npplication-filed December 20, i911. Serial No. 667,001.

ing device. However, as heretofore expla-1ned, t,'h'e clamps commonly in use are 'set-bolts-' 'having=their heads projecting be- Patented Aug. carers-.1;

yond the outsidedimensions of the body portion. This is undesirable inasmuch as such projections frequently catch in the operators sleeve causing broken arms or other less serious injuries. 1- have therefore arranged; a clamp which cannot in any position project outside of the body p ortion.---

In this instance the body portion 15 pro vided with"a threaded opening 1-3,within which is seated the threaded shank l i of a set-bolt. Said shank is-p'rovided with an octagonal head 15 and a work-contacting oint 16. For convenience each one of the eight-faces of the bolt head 15 may be pro vided witha perforationto assist in actu;

ation of the bolt without the use of a wrench. While the opening 13 in the body portion of the'lathe dog is shown as extending entirelytherethrougm it' will be understood that it may be terminated near the edge of the body portion thus leavinga smooth outer edge; It will. also be obvious that other modifications may be made and such modifications as are, within the scope of t e'appended claims I consider withinthe spirit of my invention.

I claim: I v l. A lathe dog comprising, in combination, a one-piece member having a receiving opening therein,v posed entirely within said -opening, substantially as described.

' 2. A lathe dog comprising, incombination, a one piece member ceiving opening therein, entirely within the limits of said member actuating device within said opening, substantially as described.

v 3. A'lathe dogcomprising, in combinawork--; and. a clamp dis-- y the limits of said meinher and having a portion projecting within having a work-rea clamp disposed tion, a one-piece angular member having a work-receiving opening therein, a screwclainp disposed entirely within the limits of said member, said screw clamp having an actuating head located within said opening, substantially as described.

JACOB LENZ.

Witnesses:

vW. F. SULLIVAN,

W. J. WEST.

flommissioner of latenta,

. Washington, D. 0. 

